Inspection Of Thermostat

NOTE: The thermostat is numbered according to the valve opening temperature.

(a) Immerse the thermostat in water and heat the water gradually.

lb) Check the valve opening temperature. Valve opening temperature: 80 — 84"C

If the valve opening temperature is not within specification. replace the thermostat.

(c) Check the valve lift.

Valve lift: 8 mm (0.31 in.) or more at 95°C |203°F)

If the valve lift is less than specification, replace the thermostat.

(d) Check that the valve spring is tight when the thermostat is fully closed.

If necessary, replace the thermostat.

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